"Do all your 25 filenames start pm_1206312_in and if not what are they like ?" All 25 files ends with .txt and starts with 4_os_ The middle part is different for all 25 files. as an example 4_os_abc.txt, 4_os_def.txt...so on.

In reply to Re^6: find common data in multiple files by mao9856
in thread find common data in multiple files by mao9856

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